I am not a big fan of Google Glass or running (basketball is my sport, and I also swim to stay in shape) but this is a pretty cool product combining those two things (you can also use it for biking and skiing): Race Yourself.
You can have your previous runs added into your view using Google Glass. This product is in development.
Related: Fast Hovercraft – Self Balancing Enclosed Motorcycle – Try on Clothes and Accessories Virtually
Pingback: Virtual Reality Continues to Make Progress | Curious Cat Gadgets